usmc81301

I am looking for peoples opinions on which transmission is better and why they think so. I have been doing research on gearing and so forth. I would just like to know from people who have used them. I am planning on changing soon to be nicer to my 6.5LTD. Thanks.

DieselBob

My , I would go with the 4L80. They are made to handle the high torque of BB trailer pullers. As with any slush box there are 3 things to remember. Cooling, cooling and cooling. On the flip side I did had a V1500 Jimmy with a 700R4 that went 350K+ miles with no problem.

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Of course, the whole point of a Doomsday Machine is lost, if you *keep* it a *secret*! Why didn't you tell the world

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1971 M35A2
1991 M105A2

tanhmmwv

i have the 700R4 behind a 6.5 NA motor. in the final stages of a complete restoration. Will let you know how it is once driven for a little while.

bigflew

4l80 is definetly stronger and more dependable. the early 700r4s were a bad deal but gotbetter with time. if you are having one built tell the builder what you are doing with it they are built a little diffrent for diesels (mostly valving) also a used one should be set up for diesel.
one more thing the E in 4l80e is for electronic controll and are controller by the ecm and would npt work in somthing not desinged for it. but you can get a non electronic 4l80
Thats my 2 cents worth.

bowtiecrazy

fourwheeler just done a article on the two you might check it out

PackRatWrecker

If you get a stand alone ECM & harness, think the 4L80E is a better choice.

If you want to stay mechanical, get a pro-built 700R4, & have the internal switches wired to automatically lock up in 3rd & 4th. If you use a 1-wire lockup solenoid & a TH400 kickdown plug, then all you need is a fused ignition power wire.

mudguppy

the 700R4 is also called the 4L60, just without the 'E' part. and since the 4L80E is the bigger brother to the 4L60 family, it should be a no-brainer as to which transmission would be stronger.

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Travis
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Bob'd Deuce on 16.00 XZL's
- lifted, locked, and hydro-steered
- 5.9 Cummins w/ NV4500
- hydro-boosted disc brakes
- hydraulic winch conversion

DicedDeuceMan

The 3 series will work nicer IF, you don't pull any trailer. you won't have to hook up computer.

If you plan on pulling a trailer, spend the extra money.

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usmc81301

Thanks for all the info gents. Can I put in the 4L80E and not change the transfer case? I know the drive shafts have to be shorter. I have the original transfer case.

usmc81301

The 4L80E is a 32 count spline. The 3L80 is the same i believe. Has any one changed the transmission and not the transfer case or would it be recommended to change the transfer case also. Sorry for all the questions, just want to make sure I do this right.